English verb conjugation
MUST FENCE

Regular verb: fence - fenced - fenced

Affirmation

Simple form	V-ing form
I must fence you must fence he must fence we must fence you must fence they must fence	I must be fencing you must be fencing he must be fencing we must be fencing you must be fencing they must be fencing
Perfect	V-ing perfect
I must have fenced you must have fenced he must have fenced we must have fenced you must have fenced they must have fenced	I must have been fencing you must have been fencing he must have been fencing we must have been fencing you must have been fencing they must have been fencing

Negation

Simple form	V-ing form
I mustn't fence you mustn't fence he mustn't fence we mustn't fence you mustn't fence they mustn't fence	I mustn't be fencing you mustn't be fencing he mustn't be fencing we mustn't be fencing you mustn't be fencing they mustn't be fencing
Perfect	V-ing perfect
I mustn't have fenced you mustn't have fenced he mustn't have fenced we mustn't have fenced you mustn't have fenced they mustn't have fenced	I mustn't have been fencing you mustn't have been fencing he mustn't have been fencing we mustn't have been fencing you mustn't have been fencing they mustn't have been fencing

Interrogative form

Simple form	V-ing form
must I fence? must you fence? must he fence? must we fence? must you fence? must they fence?	must I be fencing? must you be fencing? must he be fencing? must we be fencing? must you be fencing? must they be fencing?
Perfect	V-ing perfect
must I have fenced? must you have fenced? must he have fenced? must we have fenced? must you have fenced? must they have fenced?	must I have been fencing? must you have been fencing? must he have been fencing? must we have been fencing? must you have been fencing? must they have been fencing?

Interro-negative form

Simple form	V-ing form
mustn't I fence? mustn't you fence? mustn't he fence? mustn't we fence? mustn't you fence? mustn't they fence?	mustn't I be fencing? mustn't you be fencing? mustn't he be fencing? mustn't we be fencing? mustn't you be fencing? mustn't they be fencing?
Perfect	V-ing perfect
mustn't I have fenced? mustn't you have fenced? mustn't he have fenced? mustn't we have fenced? mustn't you have fenced? mustn't they have fenced?	mustn't I have been fencing? mustn't you have been fencing? mustn't he have been fencing? mustn't we have been fencing? mustn't you have been fencing? mustn't they have been fencing?